I think it's best if you read it again so I can make sense.
The correct answer is B.
The novel was written in past tense, and the radio broadcast was presented in present tense.
Dramatic Irony: The characters think one thing to be true, but the audience knows something else to be true
The reader already knows that all these irregular events are set up by Abigail. Though Danforth does not know this so he sides with her.
